QUOTE FROM SECOND LINK:
The skyhook set is incredible.
I was using the moonbolt set first but had a problem hooking the bolts in the moon because of the soft surface of the moon.
I tried coating the moon to make it harder but that did not work, the bolts kept slipping and I was getting complaints from NASA for scratching the moon.
also you need longer chains with the moonbolts, I can hook the skyhooks anywhere I want.
a great product. I hope we dont run out of sky in the future. Until that happens I will keep on using my skyhook set.